Nut-lock.



J. K. MAJOR. I

NUT LOCK;

APPLICATION FILED NOV.25,19!3.

1,142,345. Paten tedJune 8, 1915.

JOHN K. MAJOR, F PADUCAH, KENTUCKY.

NUT-LOCK.

Application filed November 25, 1913.

' nut and bolt locks.

The principal object of the invention is to provide a locking washer ofsimple construction which will coiiperate with the nut and bolt toprevent retrograde movement of the nut.

Other objects and advantages will be apparent from the followingdescription, when taken in connection with the accompanying drawings.

In the drawings: Figure 1 is an elevation of a bolt and nut showing myinvention. Fig. 2 is a longitudinal sectional View therethrough. 'Fig. 3is a vertical transverse sectional View on the line 83 of Fig. 1. Fig. dis a perspective view of the Washer.

Referring particularly to the accompanying drawings, 10 represents abolt having the longitudinal ratchet grooves 11. Disposed on the bolt isa washer plate 12, from the inner peripheral wall of which extend thespring fingers 13. These fingers are bent to extend from the face of thewasher at right angles thereto, and are arranged to engage with thelongitudinal ratchet grooves 11 of the bolt; The nut 14 has formedtherethrough, in diametrically opposite points of the wall of thethreaded opening, the grooves 15 which receive the beforementionedspring fingers 13. The washer, by the engagement of the fingers in thegrooves of the nut will rotate with the nut, and by reason of the depthof the said grooves, the fingers 13 will be permitted to ratchet overthe grooves 11, in the direction of rotation of the nut When screwingthe same home. The vertical walls of the Specification of LettersPatent.

Patented June 8, 1915.

Serial No. 802,997.

grooves will be engaged by the spring fingers, or at least one of themand prevent retrograde movement of the nut.

It will be noted that the opening through the washer is larger than theopening through the nut, so that the washer will freely rotate on thebolt and permit the fingers to spring into and out of the grooves of thebolts. In the form shown, the bolt has three grooves, and as the nutrotates with the washer, one of the fingers 13 will be disposed withinone of the grooves, while the opposite finger will be pressed againstthe threads at the diametrically opposite side of the bolt. When an evennumber of grooves are used, as for instance two or four, both of thespring fingers will either be in the opposite grooves or engaging, thethread at the same time.

From the foregoing, it will readily be seen that I have provided asimple and cheap nut lock and one in which the locking element alsoserves'the purpose of a washer. It will also be noted that the tighterthe nut forces the washer against the work, the deeper into the groovesof the bolt the fingers will be forced.

What is claimed is:

In a nut lock, the combination with a bolt having a pair of longitudinalratchet grooves formed in the shank thereof, and a nut having a pair ofgrooves formed therein and communicating with the bore of the nut, of awasher plate having a pair of resilient fingers projecting therefrom atpoints adjacent the opening of the washer, one of said fingers beingadapted to engage with one of the grooves in the shank of the bolt, andthe other of said fingers being adapted to frictionally engage with thethreads of the bolt when the bolt, washer and nut are assembled.

In testimony whereof, I aifix my signature, in the presence of twowitnesses.

JOHN K. MAJOR.

Witnesses:

C. B. CRossLAND, M. R. MASON.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents,

Washington, D. G.

